Morphology based motion detection for sensors sensitive to motion induced noise
First Claim
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1. In an implantable system, a method for using a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
- (a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology;
(b) comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, the determined level of similarity indicative of a level of motion induced noise in the sensor signal;
(c) weighting the sensor signal based on the level of similarity, wherein at least two levels of weighting are non-zero weighting; and
(d) performing one of a measurement, adjustment, decision and calculation based on the weighted sensor signal.
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Abstract
Provided herein are implantable systems, and methods for use therewith, for estimating a level of noise in a signal produced by an implantable sensor that is sensitive to motion induced noise. Sample data is obtained that is representative of a signal produced by the implantable sensor that is sensitive to motion induced noise. Such a sensor signal has a corresponding morphology. The morphology of a portion of the sensor signal is compared to a template, and a level of motion induced noise in the sensor signal is estimated, based on results of the morphology comparison.
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Citations
16 Claims
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1. In an implantable system, a method for using a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology; (b) comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, the determined level of similarity indicative of a level of motion induced noise in the sensor signal; (c) weighting the sensor signal based on the level of similarity, wherein at least two levels of weighting are non-zero weighting; and (d) performing one of a measurement, adjustment, decision and calculation based on the weighted sensor signal. - View Dependent Claims (2, 3)
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4. In an implantable system, a method for estimating a level of motion induced noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology; (b) comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, wherein step (b) includes; (b.1) aligning the portion of the sensor signal with the template; (b.2) determining an area under the curve of the sensor signal and an area under the curve of the template; (b.3) determining a difference between the determined areas under the curves; and (b.4) determining the level of similarity between the morphology of the sensor signal and the morphology of the template based on the difference in areas under the curves; and (c) estimating, based on the determined level of similarity, the level of motion induced noise in the sensor signal. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
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12. In an implantable system, a method for estimating a level of motion induced noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology; and (b) comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, wherein in case the sensor signal has experienced a morphology reversal; reversing the morphology, along a vertical axis, of one of the template and the portion of the sensor signal; and determining the level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, one of which have been reversed; and (c) estimating, based on the determined level of similarity, the level of motion induced noise in the sensor signal.
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13. In an implantable system, a method for estimating a level of motion induced noise in a signal produced by an implantable sensor that is sensitive to motion induced noise, the method comprising:
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(a) obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology; and (b) comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, wherein in case the sensor signal has experienced a morphology reversal; determining the level of similarity between the morphology of the portion of the sensor signal and a morphology of a reverse template; and (c) estimating, based on the determined level of similarity, the level of motion induced noise in the sensor signal.
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14. An implantable system including an implantable sensor that is sensitive to motion induced noise, the comprising:
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means for obtaining sample data representative of the signal produced by the implantable sensor that is sensitive to motion induced noise, the sensor signal having a corresponding morphology; means for comparing the morphology of a portion of the sensor signal to a morphology of a template to determine a level of similarity between the morphology of the portion of the sensor signal and the morphology of the template, the determined level of similarity indicative of;
a level of motion induced noise in the sensor signal;means for weighting the sensor signal based on the level of similarity, wherein at least two levels of weighting are non-zero weighting; and means for performing one of a measurement, adjustment, decision and calculation based on the weighted sensor signal. - View Dependent Claims (15, 16)
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Specification